| Eiichi Koyano | |
| Position: | Third baseman, First baseman, Left fielder, Batting coach |
| Team: | Orix Buffaloes |
| Number: | 83 |
| Bats: | Right |
| Throws: | Right |
| Birth Date: | 10 October 1980 |
| Birth Place: | Edogawa, Tokyo, Japan |
| Debutdate: | September 25 |
| Debutyear: | 2003 |
| Debutteam: | Nippon-Ham Fighters |
| Finaldate: | October 5 |
| Finalyear: | 2018 |
| Finalteam: | Orix Buffaloes |
| Statleague: | NPB |
| Stat1label: | Batting average |
| Stat1value: | .264 |
| Stat2label: | Home runs |
| Stat2value: | 71 |
| Stat3label: | Hits |
| Stat3value: | 1,260 |
| Stat4label: | Run batted ins |
| Stat4value: | 566 |
| Teams: | As player
As coach
|
| Awards: |
|
is a Japanese former professional baseball player (infielder) and currently the hitting coach for the Orix Buffaloes of Nippon Professional Baseball (NPB). He is a native of Edogawa, Tokyo, Japan. Koyano is considered a member of the Matsuzaka Generation.